Romain Svartzman @romainsvartzman

New publication out today with the Centre for Economic Policy Research @cepr.org "Chronicle of a Debt Foretold: Sovereign Debt Management Strategies for Colombia’s Climate and Biodiversity Transition", co-authored with Antoine Godin, Louis Daumas, Jeffrey Althouse, and @romainsvartzman.bsky.social !

09.07.2025 12:22 — 👍 2 🔁 2 💬 1 📌 0

We have a great job opportunity for an economic analyst focused on fiscal in our Brussels office BUT so far hardly any women have applied. Pls help us changed that and spread the word! Job posting: dezernatzukunft-my.sharepoint.com/:b:/g/person...

07.07.2025 06:27 — 👍 62 🔁 65 💬 3 📌 0

Huge thanks to all my co-authors for their important work exploring the interactions between nature and economics: Jeffrey Althouse, Bastien Bedossa, @espagneetienne.bsky.social, Léna Faucher, @mdgonon.bsky.social, Katie Kedward, Angela Modica Scala, Adam Poupard

01.03.2025 08:58 — 👍 2 🔁 1 💬 0 📌 0

We hope this paper will contribute to ongoing debates by offering concrete alternatives to the use of models that, by their very design and purpose, will unlikely reveal macro-critical issues related to nature scenarios.
Comments welcome!

01.03.2025 08:58 — 👍 1 🔁 0 💬 1 📌 0

We do so by using both: relatively simple tools (based on input-output tables) to assess short-term economic and financial exposures to specific scenarios; and two of the ecological macroeconomic models mentioned above for medium-term assessments.

01.03.2025 08:58 — 👍 0 🔁 0 💬 1 📌 0

3. We apply these insights through four case studies to illustrate how nature-related impacts can propagate through production and financial networks, with potentially large positive or negative impacts at the macro level.

01.03.2025 08:58 — 👍 0 🔁 0 💬 1 📌 0

2. We explore the potential of non-equilibrium ecological macroeconomic models to reflect the interdependencies between biodiversity, economic activity and financial stability. Rather than forcing automatic convergence towards an optimal state, they track the dynamic evolution of trajectories.

01.03.2025 08:58 — 👍 0 🔁 0 💬 1 📌 0

1. We provide a thematic summary of a broad range of nature-related transition scenarios, to support future economic assessments of nature loss or transition pathways through a more comprehensive approach.

01.03.2025 08:58 — 👍 0 🔁 0 💬 1 📌 0

The paper takes the 2023 NGFS report on recommendations towards the development of nature-related scenarios as a starting point - notably regarding its assessment of the limitations of scenarios and models being used to assess the macro-criticality of nature - and seeks to make 3 contributions:

01.03.2025 08:58 — 👍 0 🔁 0 💬 1 📌 0

Homepage C3A Coalition for Capacity on Climate Action | C3A the Coalition for Capacity on Climate Action Website homepage of C3A the Coalition for Capacity on Climate Action. Funded and hosted by the World Bank, C3A is a knowledge-exchange and capacity-building program for Ministries of Finance.

This paper puts together some of the projects on which the #C3A (www.climatecapacitycoalition.org) Nature Transition Hub has been working for the past year, and it also features some closely connected work being carried out separately by different members of the Hub.

01.03.2025 08:58 — 👍 1 🔁 0 💬 1 📌 0

DP19987 From Climate to Nature Macro-Criticality: Exploring New Scenarios and Modeling Frameworks While the macroeconomic and financial implications of climate change have long been debated by researchers as well as economic and financial decision-makers, the potential macro-critical impacts posed by biodiversity loss and the structural shift towards an economy that protects - rather than degrades - nature remain underexplored. In fact, recent studies struggle to explain why even major ecosystem disruptions show only minor macroeconomic and financial impacts in their models. Against this backdrop, this paper reviews existing biodiversity-economy scenarios and modeling approaches to assess their ability to capture the macro-criticality of nature-related transition impacts. We highlight two key gaps: (i) The prevailing tendency to adopt a narrow approach to nature-related impacts, predominantly focusing on the agricultural sector, fails to account for the multiple sectors that could also be affected—either directly or through value chain linkages. Moreover, this approach overlooks the broader socioeconomic transformations that may be necessary to facilitate a meaningful transition toward sustainability; and (ii) The limits of equilibrium-based models, which systematically underestimate the economic impact of nature-related impacts due to their focus on optimization under constraints, their assumptions about substitutability, and their limited representation of both the financial sector and propagations of shocks throughout value chains. We then make three contributions to start addressing these shortcomings: First, we provide a thematic summary of a broad range of nature-related transition scenarios, to support future economic assessments of nature loss or transition pathways through a more comprehensive approach. Second, we explore the potential of diverse non-equilibrium ecological macroeconomic models to reflect the interdependencies between biodiversity, economic activity, and financial stability. Rather than forcing automatic convergence towards an optimal state, these models track the dynamic evolution of simulated trajectories, thereby better capturing how nature loss can become macro-critical. Third, we apply these insights through four case studies to illustrate how nature-related impacts can propagate through production and financial networks, with potentially large positive or negative impacts at the macro level. We do so by using both: relatively simple tools (based on input-output tables) to assess short-term economic and financial exposures to specific scenarios; and two of the ecological macroeconomic models mentioned above for medium-term assessments. Our findings underscore the need to consider both a broad range of scenarios and alternative modeling approaches to identify the potential macro-criticality of nature. Doing so will be essential to begin to meaningfully integrate nature into economic and financial policymaking, and support efforts to halt and reverse biodiversity loss.

🗞️ New CEPR Discussion Paper out: "From climate to nature macro-criticality: exploring new scenarios and modeling frameworks": cepr.org/publications... (please reach out to me if you don't have access to the paper).

01.03.2025 08:58 — 👍 2 🔁 2 💬 1 📌 1

La dérégulation n’aidera pas l’Europe à bâtir son autonomie stratégique Alors que souffle déjà un grand vent de dérégulation de l’autre côté de l’Atlantique, la Commission européenne s’apprête à propulser l’Europe dans le même mouvement avec un projet de loi dit « Omnibus », qui risque de défaire un cadre réglementaire de durabilité longuement négocié.

A letter (in French and English) that I signed along with many other economists based in the EU, explaining why deregulation will not help Europe build its strategic autonomy. Thanks to @institut-veblen.bsky.social and @jcsmbf.bsky.social for leading it www.euractiv.fr/section/econ...

05.02.2025 18:26 — 👍 5 🔁 3 💬 0 📌 0

Romain Svartzman

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